A1419 Backlight

[wirelessplanet]

Got an A1419 27" iMac with broken glass and no backlight. Before I order the screen I wanted to test the logic board to make sure the correct voltage is coming to the screen. What pin should I test to check the voltage and what should it be?

 

[dukefawks]

Is there an image for sure? Cables not damaged? Backlight issues on these are VERY rare.

 

[wirelessplanet]

100% has image. just no backlight. cables look fine. the crack was minor hairline.

 

[wirelessplanet]

Sorry I don't have board-view or schematic for this so i flying blind.

I'm assuming that connection is the six pin one to the right of the 30 or so pin. While imac was on and screen plugged in I checked each pin to ground and only pin 4 had 1v. the rest did not have any voltage going through.

 

[dukefawks]

Check F8300 and Enable to U8200 pin 10.

 

[wirelessplanet]

I don't have board view for this one. could you pm me a copy? i checked online and everyone wants me to buy one. if not i can buy it

 

[dukefawks]

I only have a diagram for the 820-3478 sorry.